Uplink port up, down, up and down due to %ILPOWER-3-CONTROLLER_PORT_ER

[tmourelle]

My uplink port for my switch, which is a part of a port-channel is going up and down. After closer investigation, it seems it might have something todo with this error: %ILPOWER-3-CONTROLLER_PORT_ER

This is causing brief, but disruptive downtime as the port-channel takes about 30 seconds to realise and then switches to the remaining interfaces in the port-channel. Then when it fixes itself later in the day, the same issue happens for a brief moment.

This is happening for 2 days now, twice aday at around the same time of day.

This switch has been working fine for many months, but now its started to become an issue...

[balaji.bandi]

what model of the switch ? and what IOS code running ?

are you sure that port belong to port-channel ? that error show as different like PoE (may be phsical cable issue )

can you post output as below :

show etherchannel X summary (X is the port-channel number)

show interface x/x (part of the port-channel interface)

[Georg Pauwen]

Hello,

the error message could indicate a problem with the cabling. The command:

sh cable tdr interface g1/0/48

should give you the status of all four wire pairs (Pair A/B/C/D). They all should have the status 'Normal'. As far as I recall, Pair C controls PoE. Can you post the output of that command?

[Leo Laohoo]

What is the model of the switch?
Post the complete output to the command "sh interface Gi1/0/48 controll".